"I heard that Jonah said I should bring my sh-t next time," Morrison says in a video shot on the Glee set and aired on Wednesday's Fallon. "Well guess what, this is next time."

Hill, 27 -- who recently dropped 40 pounds -- argued that Morrison, 32, embarrassed him in front of a room of A-listers at a FOX event, and then attempted to prank him again at "some douchey Hollywood party." Before Morrison could even prank him, however, Hill overheard his own name being used as a punchline in Morrison's joke.

"Jonah, pick a date and I will meet you on Late Night with Jimmy Fallon and we will settle this like men. Because nobody messes with someone from musical theatre," Morrison said, before he grabbed a cane and danced an impromptu jig on the Glee set.